Sharp Carousel R-980E, Service Manual

Page: 25 / 44

R-980E
23
35 P25 IN Signal similar to P27.
When any one of G-3 line key on key matrix is touched, a corresponding signal will
be input into P25.
36 P24 IN Signal similar to P27.
When any one of G-4 line key on key matrix is touched, a corresponding signal will
be input into P24.
37 P23 OUT Segment data signals.
The relation between signals and indicators are as follows:
Signal Segment Signal Segment Signal Segment Signal Segment
P23 ............. P1 P17 ............. P5 P13 ............. P9 P07 ........... P13
P22 ............. P2 P16 ............. P6 P12 ........... P10 P06 ........... P14
P21 ............. P3 P15 ............. P7 P11 ........... P11 P05 ........... P15
P20 ............. P4 P14 ............. P8 P10 ........... P12 P04 ........... P16
38-40 P22-P20 OUT Segment data signal.
Signal similar to P23.
41 P17 OUT Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse
signal is input to P24-P27 terminal while
one of G-12 line keys on key matrix is
touched.
42 P16 OUT Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-11 line keys on key matrix is touched.
43 P15 OUT Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-10 line keys on key matrix is touched.
44 P14 OUT Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-9 line keys on key matrix is touched.
45 P13 OUT Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-8 line keys on key matrix is touched.
46 P12 OUT Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-7 line keys on key matrix is touched.
47 P11 OUT Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-6 line keys on key matrix is touched.
48 P10 OUT Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-5 line keys on key matrix is touched.
49-53 P07-P03 OUT Segment data signal.
Signal similar to P23.
Pin No. Signal I/O Description